Heater



May 7, 1935. I H. s. WHELLER I 2,000,112

HEATER Filed March 30, 19:55 4 Sheets-Sheet 1 I INVENTOR Harry .gl'ewm'tWile/ er Y B H. S. WHELLER May 7, 1935.

HEATER Filed March 50, 1933 4 Sheets-Sheet 2 INVENTOR gzes'wcuitW/zeller- A ORNEY May 7, 1935. H. s. WHELLER 1 HEATER Filed March 30,1933 4 Sheets-Sheet 3 INVENTOR Harg .gtewart Wile/[er ZTTORNEY May 7,1935. l-lys. W-HELLER 0 2,000,112

HEATER Filed March so, 1953 4 Sheets-Sheet 4 HarryfiteMzFfW/ef PatentedMay 7, 1935 UNITED STATES. PATENT OFFICE 28 Claims.

This invention relates to heating devices, and particularly, to thattype in which air is forced by a fan through a heater, and the thusheated air then discharged through nozzles or outlets into a room.

Heretofore, the discharge outlets on such heat- I ing devices have beenstationary, resulting in the discharge of the heated air to the samepart of the room and thereby directinga blast of warm air continuouslyin the same direction.

Adjacent and alternate columns or strata of hot and cold air throughoutthe room are thereby produced by the previously known heaters, withresulting unequal heat distribution. Mixing of the heat and cold airlargely depended hitherto upon convection air currents resulting fromthe temperature differences in difierent parts of the room, and to someextent, upon circulation of the heated air due to the initial velocityproduced by the discharge from the outlets.

In order, therefore, to assist circulation of and to mix the heated airwith the cooler air, it has been customary, heretofore, to discharge theair from such heaters at a comparatively high velocity. This highdischarge velocity caused penetration of the heated air into theoutermost portions of the working area and induced movement oi. air fromthe upper portions of the room. Persons in the path of the comparativelyhigh velocity warm air stream become overheated, and are greatlydiscomforted thereby, while persons in other parts of the room arecomparatively cold.

My invention overcomes this inherent disadvantage hitherto encounteredwhile, at the same time, retaining the desirable high velocitydischarge. This is done by direct-ing the heated air discharge outletscontinuously to successive parts of the working area. Streams oi. warmair are thereby directed at intervals to all given points in the workingarea, and no point receives a continuous blast of warm air as is thecase with previously known heaters.

- My invention contemplates the provision of simple and efllcient meansfor thoroughly mixing the heated air as it issues from the heater outletwith the cooler air 01' the room, thereby eliminating adjacent alternatecolumns or strata of hot and cool air and producing a uniform airtemperature throughout the room.

My invention further. contemplates the provision of a continuouslyrotatable discharge outlet and means for rotating the same wherebyheated air is continuously discharged downwardly and outwardly in theproper direction successively to all parts or the room and therebyuniformly difi'used throughout theentire working area.

The various objects of my invention will be clear from the descriptionwhich follows, and

from the drawings, in which, 5

Fig. 1 is a front elevation and partial section of my new heater,showing the continuously rotatable outlet and the means for continuouslyrotating the same. I

, Fig. 2 is a top plan view of the same, the heater 10 being omitted toexpose the underlying parts.

Fig. 3 is a partial vertical section on an enlar'ged scale of a portionof the driving means.

Fig. 4 is a view similar to Fig. 1 of a modified form of my improvedheating device. 15

Fig. 5 is a to'p'plan view, similar to Fig. 2, 01' Fig. 4.

Fig. 6v is a front elevation and partial vertical section of anothermodified form of my improved heater.

Fig. 7 is a horizontal section of the same, taken on the line 1-1 ofFig. 6.

Fig. 8' is an enlarged front elevation of the means for controlling thedriving vane shown in Figs. 6 and 7.

Fig. 9 is a front elevation and partial section of a further modifiedform of my improved heater.

Fig. 10 is a horizontal section of the same, taken on the line 10-10of'Fig. 9. l

Fig. 11 is a view similar to Fig. 9 of a further modified form of myimproved heater.-

Fig. 12 is a horizontal section of the same.

In that practical embodiment of my invention which I have illustrated byway of example, in Figs. 1 to 3 inclusive, the heater casing I0 ispreterably suspended overhead as to the ceiling of a room in any desiredposition and in a manner. well known in the art and which therefore neednot be described in detail. Itwill be understood, 40 however, that myinvention may be applied to any type of heater, as for example, a wallor' floor type, and that I do not intend to limit myself to the specificstructure illustrated.

To heat the air drawn through the casing by the Ian II, the heatingtubes l2 are secured to the steam and return headers B, which arefastened in the casing by means of the key plates ll, preferably weldedto each end or the headers. The headers may be drilled and machined forthe reception of the heating tubes 12, which are secured thereto by anysuitable means, as for example, by a compression union.

In order to increase the heating capacity of the tubes, a; series ofclosely spaced flatflns ll, 5

arranged preferably with their greatest dimension in the direction ofair flow, are forced onto the tubes. One or more discharge outlets I6may be provided, through which the heated air is discharged in agenerally downward direction and at a comparatively high velocity intothe outer air of the room. Said outlet or outlets l6 communicate withthe interior of the casing l0, and are suitably mounted for continuousrotation, as willbe later pointed out.

The motor l8, which is secured to the casing III as by means of the armsl9, and which drives the fan mounted coaxially therewith, is insulatedfrom the heated air passing, through the discharge casing by the crownmember i1 and is thereby protected against possibility of damage fromexposure of the motor to heat. Said arms I9 are stationary and aresuitably secured tothe casing l0.

To provide means for thoroughly mixing the heated air with the coolerair in the room, and for insuring continuous distribution of heated airsuccessively to all parts of the room, I rotatably mount the airdischarge casing 20 on the heater casing in and provide means forrotating the discharge casing. Said casings are preferably arrangedcoaxially of the motor shaft 22, and of the fan r The discharge casing20 comprises the preferably upright annular wall 24, which is providedwith an uppermost horizontal annular flange 23 which rests on'the seriesof spaced rollers 25, whereby the casing 20 is revolubly supported, saidcasing terminating in the discharge outlets I6. Each of the rollers 25is secured to the heater casing In or to an extension thereof, by meansof a pin or stud 26. Secured to the upright wall portion 24 of thecasing 20 in any suitable manner, as by rivets, bolts or welding, is theannular angle member 21, on which rests one flange of the second anglemember 28, said members being suitably secured together.

- The verticalflanges of the angle member 2% is in turn secured to thedischarge outlets i6 to secure the outlets to the remainder of thecasing and to permit rotation of the entire casing, i eluding theoutlets, as unit.

While I have shown the discharge casing with 4 four discharge outlets,circumferentially arranged on the casing 90 apart, as shown in Figs. 1and 2, it will be understood that one outlet as in Figs. 4 and 5; or twooutlets as in Figs. 6 and '7, or any number of outlets desired may beprovided instead, as may be found convenient or desirable, and that saidoutlets may be arranged at the same inclination or at different angles.as illustrated in Fig. 1.

Air is drawn over the finned tubes l2 by the fan II, and is thendischarged through the outlets |6, which are continuously rotated bymeans which will be later described. The heated and conditioned air isthereby given a rotary motion in a generally downward and outwarddirection.

The rotation of the discharge casing insures the continuous distributionof heated air continuously to all parts of the room successively, by theproduction of a continuous rotating stream of heated and conditioned airspreading downwardly and outwardly, and which, because of its motion,assumes a spiral form, penetrating the cool air in the room, mixingthoroughly therewith, and thereby producing a uniform air temperaturethroughout the entire extent of the room. A considerable saving of fuelis thereby made possible.

' I The means for operating the rotatable. discharge outlets may take, anumber of different forms, a few of which have been illustrated by wayof example. For instance, the separate and independent motor shown inFigs. 1 and 2 may be employed in connection with suitable connectingmechanism, or the fan motor and connecting drive shown in Figs. 4 and 5may be used, or the .reaction vane type shown in Figs. 6, '7 and 8,

and Figs. 11 and 12 may be used.

In that form of my invention illustrated in Figs. 1 and 2, the casing 20is rotated by a separate and independent motor I which is secured to theheater casing H1 in any suitable manner,

as for example, by means of the brackets or hang-' ers 8 and 9. Themotor frame is provided with the integral casing 30, enclosing suitablereduction gearing such as a worm and worm wheel, which gearing isoperatively connected to the friction roller 2| on the driven shaft 3|,and engaging the upper surface of the flange 23. The speed at which thedischarge casing is rotated is predetermined by the speed of the drivingmotor I, the reduction ratio of the reduction gearing and the diametersof the friction roller and flange 23 and may be varied between anydesired limits by change of motor speed as by a rheostat, if desired.The roller 2|, by reason of its frictional contact with the flange 23,rotates the outlet casing on the supporting rollers 25. Depending fromthe heater casing are the. angle brackets 32, the upright arm of each ofwhich may be utilized to support the pin or stud 26 for the roller 25,and the horizontal arm 33 of which receives the vertical roller pin orstud 35. Rotatably mounted on the respective vertical pins 35 are thelateral rollers 36, which take up any lateral play or displacement ofthe discharge casing and thereby prevent -material vibration, as well asassisting in reducing the friction against rotation. This method ofsupporting the discharge casing also results in comparatively noiselessoperation of the rotating member.

While I have shown the discharge casing and outlets driven by a motorthrough reduction gearing and a friction pulley, I do not wish to limitmyself thereto, as it will be understood that the motor may rotate thedischarge outlets by means of a direct gear drive on the casing, or abelt and pulley or chain and sprocket or by any other suitable and wellknown driving mechanism.

The stationary crown member I! above the fan motor 8 cooperates with thelower inner rotating wall 38 to form the inner part of the dischargeoutlets It, the axially disposed and stationary annular ring 39 on thelower perimeter of the crown member cooperating with the rotatingannular ring 40 on the upper and inner perimeter of the discharge casingto present an air tight sliding joint between the stationary crownmember and the rotating outlets. If desired, friction rollers or ballbearings may be suitably secured to the crown ring 39, therebysupplementing or replacing the rollers 36 in providing lateral sup,-port for the discharge casing in its rotation.

In order to deflect the heated air as it issues from the dischargecasing at any angle to the vertical, each discharge outlet may beprovided with an air diffuser vane or baffle 42, which may be securedthereto in any suitable manner as by means of the bolts 4|. Said boltspermit adjustment of the vanes to any desired angle. In oper-- outlet oroutlets IS. The heated or conditioned not become overheated owing toitsprotectionby the crown member.

Where the discharge casing is provided with more than one dischargeoutlet, as in Figs. 1 and 2, each outlet may be directed at a difierentangle to the vertical so that the heated air as it is discharged fromeach outlet, is directed toward successive parts of the working areaoutwardly from the heater to the outermost portion of said area. Forexample, the discharge outlet I may be directed downwardly at acomparatively small angle to the vertical, the next outlet I62 beingdirected downwardly away from the heater at a greater angle to thevertical, the third outlet at a still greater angle, and so on.

Continuously swirling columns of heated air,

.increasing in diameter as the distance from the to the outer limits ofsaid area, thereby assist-' ing penetration of the heated air to theoutermost parts of the area. If desired, the angles of inclination ofthe discharge outlets may be so arranged to form contiguous or spacedcolumns of heated air.

Referring now to Figs. 4 and 5, I have shown a modified form of myinvention, in which the continuously rotatable outlet is driven by thefan moter 43, making it unnecessary to provide a separate driving motor.

It will be understood that the fan H, in this case, being above theheater casing instead of below it, as in Fig. 1, is in reversed positionrelatively to the fan of Figs. 1 and 2 to drive the air downwardlythrough the heater coils. The fan motor is secured to the heater casingby means of the arms 51 and drives the pulley 41 on the motor shaft. Thepulley 44 secured to the count er shaft 45 is driven by the belt 46 fromthe drive pulley 41.

A roller 49 on the counter shaft 45 is frictionally engaged with anddrives the roller 55 on the parallel shaft 5|. The friction roller 52 onthe same shaft 5| engages the cylindrical surface of the annular flangedwall or-skirt 53 to cause rotation of the outlet casing and the outletcarried thereby.

The counter shafts 45 and 5| are suitably supported on the heater casingas by means of the journal 54 and the brackets 55, respectively. Thewall or skirt 53 is suported for rotation relatively to the heatercasing It! by rollers 25 in the manner previously describedin connectionwith Figs. 1 and 2.

While I have shown a discharge casing having a single discharge outlet56, in connection with the present description, it will be understoodthat any desired number of outlets may be provided.

Where, as in this case, a single discharge outlet is used, I prefer tosecure the motor above the heater casing ill in order that it is notexposed to the stream of hot air, as would be the case' if the motorwere secured under the heater casing and therefore, in the dischargecasing itself.

The discharge casing is rotated by the fan motor and intermediatepulley. Air is simultaneously forced through the casing over the heatingtubes by the fan, and the heated air discharged through the rotatingoutlet. The heated air is thereby given both a downward and rotarymotion and is discharged continuously to successive parts of the workingarea in a manner similar to that of the multi-outlet discharge, casingshown in Fig.1.

It will be understood that for the friction pulleys shown, may besubstituted a direct gear drive, friction rollers, chain and sprocket orother suitable means for operatively connecting the fan motor to therotatable discharge outlets.

Referring now to Figs. 6, 7, 8, 11 and 12, I have shown another form ofmy invention designed to eliminate the use of mechanically operatedparts for rotating the discharge casing.

In this form of my invention, one or more suitably curved reaction vanes59 are secured adjustably or fixedly to the discharge casing in the pathof the stream of heated air. The velocity of the stream creates areaction pressure on the vanes, tending to forcethe vanes out of thepath of the stream and thereby rotating the discharge casing. Asillustrated, the vane 59 is adjustable, but it will be understood,without further illustration, that the vane may, if desired,'be fixed tothe discharge casing, in which case the adjusting means shown may beomitted.

The flange 60 of the reaction vane is adapted to conform to the shapeof, and to lie against and in pressed engagement with the inner surfaceof the-discharge outlet 6|.

A preferably curved face 52 is formed integrally with and at rightangles to the flange 6D and is positioned at any suitable point in thedischarge outlet, extending generally in a radial and downwarddirection. It will be understood that the face 62 may assume any desiredform, forexample, a parabolic curve, though a plane surface, or acombination of plane and curved surface or two plane surfaces at anydesired angle to each other may be used, if desired, as will be obviousto those skilled in the art.

It will be apparent that the'reaction force of the air on the vane willbe determined by the angular position of the face 62 relatively to thepath of the air. the minimum force resulting when the face is positionedsubstantially parallel to the air path, and the maximum force resultingwhen this face is positioned in the path of the air 'at some anglethereto. The speed of rotation of the discharge casing will thereforedepend on the position assumed by the reaction vane, but where it isfixedagainst adjustment, the speed of rotation of the discharge casingcannot be varied otherwise than by changing the velocity of the airstream.

The means for adjusting the speed of rotation of the discharge'casingbetween desired' limits will now be described.

The reaction vane 59 is pivotally secured near one of its ends,preferably the lower end, to the discharge casing by means of the hingepin 63, which is fixed to the vane and movable therewith, the other endof the vane being movable for purposes of adjustment. To control andguide the movable end in its movement, the spring-pressed locking pin 65extends through the slot 64 provided in the discharge casing and ment ofthevane, but nevertheless retaining the.

vane in adjusted position "under the influence of the spring thereon,and the friction resulting from the pressure of the springfl5 whichresists movement of the pin in the slot.

On the hinge pin 63 is fixedly mounted the lever 66.- At each end ofsaid lever is suspended a manipulating cord, chain or rod as 61. Whenthe proper one of the members 61 is manipulated, the lever 66, togetherwith the hinge pin 63 and the vane fixed thereto, are rotated into thedesired position in the path of the air stream to impart the desiredspeed of rotation to the'discharge casing.

In order to rotatably secure the discharge casing 58 to the heatercasing 68, the spider arms 69 are suitably secured to one of the annularflanges III] of the angle member I0 depending from the heater casing.The discharge casing is provided with a corresponding flange II slidablyabutting against the flange I10 whereby a comparatively air-tightrotatable union is effected. Journalled in a suitable hearing at theintersections of the spider arms 69, is the shaft I2, which is providedat'its lower end with a suitable thrustbearing such as a ball or rollerbearing or the like, and'which shaft passes through the hollow shaft I3of the discharge casing. A perforated plate I4 provided with suitableextensions secured to the discharge casing near the lower end of thehollow shaft and resting on the bearing or on an enlargement at the endof said shaft I2 in or on which the bearing may be arranged, rotatablysupports the, easing on the bearing.

- It will be seen that air is forced by the fan through the heatercasing and over the flnned tubes and the heated air is then dischargedthrough the outlets which are simultaneously rotated by the reactionpressure on the vanes caused by the passage of the hot air over thesevanes. The rotation of the discharge outlets imparts a downward androtary motion to the hot air in the manner previously described, therebythoroughly mixing it with the cooler air throughout the room.

Referring now to Figs. 9 and 10, I have shown a modified form of 'myinvention in which the continuously rotatable discharge casing I6 isdriven by the vaned member or air turbine 11, thereby utilizing thevelocity energy of the heated air stream to provide the driving power,as will be later described in detail.

Secured to the heater l0 and depending therefrom, is the air duct I8, inthe form of an inverted truncated cone, and terminating .at its lowerend in the annular flange I9.

In order to rotatably secure the discharge casing 16 to, the air ductI8, the annular ring 80, provided with the spider arms 8|, is fixed tothe air duct I8 on its inner surface 82. Mounted in the spider arms 8|at their intersection-03 is the preferably vertical shaft 84, which isprovided at its lower end with a suitable thrust bearing 85,

' which'may take the form of a ball or roller bearcarries the spiderarms 88. The hub 89 is prothe air duct I00.

vided at the intersection of the arms 88 and rotatably supports thedischarge casing on the bearing 85.

The air turbine 11, provided with a plurality of reaction vanes orblades is attached to the shaft 9|, which is provided at its lower endwith the friction disc 92. While I have shown the reaction blades of theair turbine 11 in the form of a fan, it will be understood thatv theseblades may assume any other suitable form adapted to convert thevelocity of the air stream into a reaction pressure on the blades.

In order to operatively connect the rotating means to the dischargecasing and to support said means in their operative positions, thebracket 93 is suitably secured to the shaft 84 as by means of the locknut 94. Pivoted intermediate its ends to said bracket 93 is the arm 95,which is provided at one of its ends with the bearing 96, in which isjournalled the shaft 9i.

Suitably secured to the spider arms 88 intermediate their ends is theannular wall l03, with the inner surface of which the disc 92 is infrictional engagement.

It will be seen that air is forced by the fan through the heater casingand over the finned tubes and through the tapering air duct.

The air duct assumes the function of a'nozzle directing the air streamgenerally toward the turbine vanes or blades and increasing its velocitybefore impingement on the reaction vanes or blades. The velocity of theair stream creates a reaction pressure on the blades, causing theturbine to rotate. The friction disc 92 is thereby rotated, and in turn,rotates the discharge casing, being .held in frictional engagement withthe annular wall I03 by means of the tension spring 91. Said spring isfastened at one of its ends to the arm 95 and at its other end, to thebracket 93.

The arm 95 is thereby urged to rotate about its pivot I02 to press thedisc 92 at all times against the wall I03 and thereby insure properfrictional engagement of the disc and the wall.

It will be apparent that the heated air as it is forced through thedischarge casing causes rotation of said casing to discharge a stream ofheated air continuously and in the manner previously described. v

In that form of my invention illustrated in Figs. 11 and -12, therotatable reaction blades of the air turbine are formed from the spiderarms 98, and are secured to the discharge casing 99, whereby said casingrotates with the arms 98 relatively to In this form of my invention, thesupporting means for the outlet casing is similar to that illustrated inFigs. 9 and 10, and the description thereof need not therefore berepeated. The spider arms 98, however, assume the function of the bladesof the separate air turbine of Figs. 9 and 10, and are suitably formedto utilize the velocity of the air stream as a reaction pressure and tothereby cause rotation of the arms 99 and the discharge casing 99 towhich they are secured. It will be apparent that the heated air will bedischarged into the room in the manner previously described inconnection with the other forms of my invention.

It will be seen that I have provided means'for thoroughlymixing theheated air discharged from heaters 01; this type with the cooler air inthe room, thereby heating the room efficiently and economically andproducing a uniform temperature throughout its entire extent.

It is apparent that mixing of the air throughout the room by convectionair currents is elimicombination, a sta'tionaryheater casing, a plunatedby my improved heater, with resulting increase in heating efllciency andattendant lower heating costs and increased comfort to the occupants ofthe room.

While I have shown a fan of the propeller type, it will be understoodthat any type of fan may be used such as a centrifugal fan, blower orthe like.

While I have shown and described certain specific features of myinvention, it will be'understood that I do not intend to limit myselfthereto, but intend to claim my invention as broadly as may be permittedby the state of the prior art and the terms of the appended claims.

I claim:

1. In a heater, a stationary heater casing, a heating pipe within thecasing, a series of spaced radiator fins carried by the pipe, a motorcarried by the casing, a revoluble fan arranged adjacent the casing-andcoaxially of and driven by the erally downward and outward, directionand distributed in a continuous stream to all par-ts of a predeterminedarea successively.

2. In a heater, air heating means, a discharge casing mounted forrotation-relatively to said heating means, a discharge outlet extendingdownwardly from, and carried by the casing and inclined to the vertical,means for causing continuous rotation of said casing, and means forforcing air in a substantially vertical direction through the heatingmeans and the rotating casing said casing mounted independently of andfree of the air forcing-means, whereby a column of heated air iscontinuously discharged substantially vertically and outwardly from thecasing and distributed successively to all parts of the working area. d

13. In a device of the character described, the combination withstationary heating means, of

- an air disturbing: member adjacent the heating means and adaptedtoeifect an initial movement of air over said means, a discharge casingmounted for rotation relatively to the heating means and the airdisturbing member and provided with an air discharge outlet extendingfrom the eas- .ing and means operatively secured to the casing forcausing continuous rotation of the casing, whereby the heated air isgiven a secondary discharge movement by the rotating casing, and therebydistributed successively to all parts of the working area.

- 4. In a device of the character described, the

combination with stationary air heating means, of an air disturbingmember adapted to effect discharge movementof air past the heatingmeans, a tapering air duct extending therefrom and mounted for rotationabout its central axis relatively to and independently of the airdisturbing member, and means for causing continuous rotation of theoutlet, the said air duct increasing 7 r the discharge velocity of thedischarged heated air.

5.Inadeviceofthecharacterdeleribe'fiin rality of stationary finned tubessecured therein,

a rotatable discharge casing provided with an upright annular wall andhaving a downwardly directed discharge outlet, said wall terminating ingtherefrom, means supported by the heater.

casing for continuously rotating the discharge casing comprising afriction disc engaging said flange, and a motor operatively connected tosaid disc, and an air disturbing member in the heater casing adapted toefiect an initial movement of comparatively-cool air through the heater,the heated airdischarged through the outlet being given a secondarymovement by the rotating discharge casing to distribute said heated airover a predetermined area and in all directions.

6. ha heater, means for generating and heating a stream of air, andmeans for discharging a rotating column of air: spreading downwardly andoutwardly, comprising an air discharge duct rotatably mounted adjacentthe heating means and independent of the airgenerating means and inposition to receive and to discharge the stream at an increasedvelocity.

7. In a heater, means for generating and heating a stream of airincluding a, motor and a fan driven thereby, an inwardly tapering airduct depending from the heater, an outlet casing arranged to receive thestream at one end and to discharge the stream from its other end,

means for rotatably supporting the outlet casing,

and an air turbine arranged in the air stream and' operatively connectedto the casing for continuously rotating said casing.

8. In a heater, means for generating and heating a stream of air, adischarge casing arranged adjacent said means an air discharge ductarranged on the casing and projecting therefrom -in position todischarge the stream, a motor,

and means operatively connecting the motor to the casing for rotatingthe casing on the opera tion of the motor. a 9. In a heater, means forgenerating and heating a stream of ainincluding a stationary motor and afan driven thereby, an outlet casing for said stream, an air turbinearranged in the air stream and means for operatively connecting themotor to the casing for rotating the casing relatively to thefirst-mentioned means.

10. In a heater, means for generating and heating a stream of air, 'arotatable outlet .cas-

ing for said stream, and deflection means atranged in the'path of thestream and operated I thereby and operatively connected to the casingfor rotating said on the operation of said first-mentioned means.

'11. Inaeeiling'heater, acasing adapted tebie arranged adiaoent' the ofa room, air heating in"the o'asing, an air discharge casing mounted forrotation relatively to the ceiling casing air duct extending therefrom,and means carried by one of said casings for causing continuous rotationof thedischarge casjusting the angular position of the member inthepathofthestroam.

13. In a heater, means for generating and heating a stream of air, arotatable outlet casing for said stream provided with a slot, adeflection member carried by the outlet casing, a pin on one end of themember secured to the easing, and a spring-pressed pin extending throughthe slot and secured to the other end of the member.

14. Ina heater, means for generating and heating a stream of air, arotatable outlet casing for said stream, an air discharge duct dependingfrom said casing, means for rotatably supporting said casing, a motor,and friction means operatively connecting the motor to the casing forrotating the casing on the operation of the motor.

15. In a heater, a stationary heater casing provided with heating means,means for generating a stream of air through the casing, an outletcasingadjacent the heater casing, means engaging the inner surface ofthe outlet casing for rotatably supporting the outlet casing, means forpreventing lateral movement of the outlet casing during its'rotation, amotor, and means operatively connecting the motor to the outlet casingfor rotating the outlet casing relatively to the heater casing on theoperation of the motor.

16. In a heater, means for generating and heating a stream of air, anoutlet casing rotatable relatively to said means, a pair of opposedIriction discs arranged on opposite faces of the casing, and means forrotating one of said discs to rotate the casing.

17. In a heater, means for generating and heating a stream of air, anoutlet casing rotatable relatively to said means, adjustable deflectionmeans arranged in the path of the stream 01? said stream.

18. In a heater, means for generating and heating a stream or air,-arotatable outlet casing for the stream, and a curved vane secured to theoutlet casing-and arranged in the path of the stream to cause rotationof said outlet casing under the influence of the stream.

19. In a heater, a stationary casing, means for generating and heating astream of air adjacent the casing, an air duct depending from thecasing, discharge means rotatably secured to the air duct, an airturbine arranged in said duct and means for operatively connecting theturbine and the discharge means.

20. In a heater, means for generating and heating a stream of air, anoutlet casing arranged for rotation relatively to the said means, andprovided with an upright annular wall, an air turbine arranged in thestream and operated thereby and a discin frictional engagement with thewall and operatively connected to the turblue.

' 21. In a heater, means for heating a stream of air, means forgenerating a stream of air and eflecting an initial movement of the airpast the heating means, and means for effecting a secondary movement tothe thereby heated air, said tioned in vertical alignment with the airgencrating means, and means for causing rotation of the dischargecasing, and means extending from the discharge casing for, directing arotating column of heated air continuously and successively to all partsof the working area upon rotation of the discharge casing.

22. In device of the character described, means for generating a streamof air, air heating means, air discharge means mounted for rotationrelatively to said heating means, means extending from the air dischargemeans and arranged to convey the heated air from the generating meansfor discharging a stream of heated air to successive portions of theroom.

23. In a device of the character described in combination, air heatingmeans, means for imparting an initial movement of air past the heatingmeans, means for imparting a secondary movement of the heated air at anincreased velocity and means for continuously rotating the secondarymovement imparting means whereby a column of heated air is directedsuccessively in all directions of rotation of the secondary movementimparting means.

24. In a device of the character described, in combination, heatingmeans, means for imparting an initial movement of air past the heatingmeans, a discharge casing rotatably mounted on the heating means. meansfor imparting a secondary movement of the heated air at an increasedvelocity projecting-from the discharge casing and means for continuouslyrotating the discharge casing whereby a column of heated air is directedsuccessively in all directions of rotation of the discharge casing.

25. In a device of the character described, means for generating astream of air, air heating means, air discharge means rotatably mountedon the heating means, means for preventing lateral movement of thedischarge means during its rotation, and means operatively connected tothe discharge means for rotating the discharge means relatively to theheating means.

26. In a heater, means for generating and heating a stream of air, anoutlet casing arranged adjacent said means in position to discharge thestream, a motor, means operatively connecting the motor to the casingfor rotating the casing on the operation of the motor and means forpreventing lateral movement of the outlet casing during its rotation.

27. In a heater, means heating a stream of air, and means forvdischarging a rotating column 01' air spreading downwardly andoutwardly, comprising an outlet rotatably mounted adjacent the heatingmeans and in position toreceive and to discharge the stream and means toprevent lateral displacement of the outlet during its rotation.

28. In a heater, means for generating and heating a stream of air, andmeans for discharging a rotating column of air spreading downwardly andoutwardly comprising an outlet rotatably mounted adjacent the heatingmeans and in position to receive and to discharge the stream and meanssecured to the outlet and arranged in the path of the air stream for.deflecting the said air stream to thereby urge the outlet to rotate.

HARRY STEWART WHELLER.

tor generating and

